云数据库 GAUSSDB-CREATE ROW LEVEL SECURITY POLICY:示例

时间：2024-11-02 18:53:03

云数据库 GAUSSDB

示例

--创建用户alice
openGauss=# CREATE USER alice PASSWORD 'xxxxxxxxx';

--创建用户bob
openGauss=# CREATE USER bob PASSWORD 'xxxxxxxxx';

--创建数据表all_data
openGauss=# CREATE TABLE public.all_data(id int, role varchar(100), data varchar(100));

--向数据表插入数据
openGauss=# INSERT INTO all_data VALUES(1, 'alice', 'alice data');
openGauss=# INSERT INTO all_data VALUES(2, 'bob', 'bob data');
openGauss=# INSERT INTO all_data VALUES(3, 'peter', 'peter data');

--将表all_data的读取权限赋予alice和bob用户
openGauss=# GRANT SELECT ON all_data TO alice, bob;

--打开行访问控制策略开关
openGauss=# ALTER TABLE all_data ENABLE ROW LEVEL SECURITY;

--创建行访问控制策略，当前用户只能查看用户自身的数据
openGauss=# CREATE ROW LEVEL SECURITY POLICY all_data_rls ON all_data USING(role = CURRENT_USER);

--查看表all_data相关信息
openGauss=# \d+ all_data
                               Table "public.all_data"
 Column |          Type          | Modifiers | Storage  | Stats target | Description
--------+------------------------+-----------+----------+--------------+-------------
 id     | integer                |           | plain    |              |
 role   | character varying(100) |           | extended |              |
 data   | character varying(100) |           | extended |              |
Row Level Security Policies:
    POLICY "all_data_rls"
      USING (((role)::name = "current_user"()))
Has OIDs: no
Options: orientation=row, compression=no, enable_rowsecurity=true

--当前用户执行SELECT操作
openGauss=# SELECT * FROM all_data;
 id | role  |    data
----+-------+------------
  1 | alice | alice data
  2 | bob   | bob data
  3 | peter | peter data
(3 rows)

openGauss=# EXPLAIN(COSTS OFF) SELECT * FROM all_data;
      QUERY PLAN
----------------------
 Seq Scan on all_data
(1 row)

--切换至alice用户执行SELECT操作
openGauss=# SELECT * FROM all_data;
 id | role  |    data
----+-------+------------
  1 | alice | alice data
(1 row)

openGauss=# EXPLAIN(COSTS OFF) SELECT * FROM all_data;
 QUERY PLAN
----------------------------------------------------------------
 Seq Scan on all_data
   Filter: ((role)::name = 'alice'::name)
 Notice: This query is influenced by row level security feature
(3 rows)